Humans are pretty good at nuking (literally or figuratively) entire ecosystems. See the Fertile Crescent, for example. However, the damage we've done over the

Humans are pretty good at nuking (literally or figuratively) entire ecosystems. See the Fertile Crescent, for example. However, the damage we've done over the last ten thousand years may be reversible. There's at least one team working on a way to turn deserts into self-sustaining forests or even rainforests, and it's very promising. The trick is going to be figuring that out before we make ourselves extinct.